Use tox to run Travis tests

.travis.yml

@@ -2,5 +2,10 @@ language: python
 python:
     - 2.6
     - 2.7
-install: pip install -r requirements/default.txt -r requirements/test.txt
-script: nosetests
+install: pip install --use-mirrors tox
+script: contrib/release/travistest
+notifications:
+    irc:
+        channels: "irc.freenode.org#celery"
+        on_success: change
+        on_failure: change

contrib/release/travistest

@@ -0,0 +1,4 @@
+#!/bin/bash
+#--
+export TOXENV="py$(echo $TRAVIS_PYTHON_VERSION | sed 's/\.//g')"
+tox